Summary of Significant Accounting Policies (Business Acquisition) (Details) - Alfa Energy Ltd £ in Millions, $ in Millions	1 Months Ended
Oct. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Oct. 31, 2022 GBP (£)
Business Acquisition [Line Items]
Percentage of ownership acquired	100.00%		100.00%
Initial cash payment	$ 22
Goodwill		$ 16
Maximum additional consideration	$ 17		£ 14
Contingent consideration payment term	3 years

Term of payment of additional consideration in a business combination.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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